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The classroom mystery box

In which year did the French Revolution begin?

Unlock to reveal the reward

Classroom

An escape game for your class, built in a free period

Turn a revision session into a locked trail: each question gives a digit, the digits open the final box, and the class works out loud instead of filling in a worksheet. Built in your browser, played on the phones or tablets they already have, and nothing for pupils to sign up for.

How it works

1

Turn each question into a digit

Five questions from the syllabus, five digits, one final code. The maths is the game rather than a worksheet.

2

Put the box at the end

The reward can be small: five minutes of break, the choice of next activity, a certificate, a video. What matters is that it is collective.

3

Hand out one link

Or a printed QR code per table. Groups race, or the whole class works one trail together on the board.

Designed down to the last detail

Every pixel of the lock is yours to style.

Nothing on the screen is fixed. Pick from dozens of looks, choose the object that opens or upload your own pictures, set the typeface and size, and end on your own reveal. Your players see exactly the screen you designed.

Look

49 looks, solid colours and gradients. Each one repaints the whole page behind the lock.

Object

31 drawn objects, shut while the lock holds, open once it gives way.

Typeface and size

10 typefaces and 6 text sizes, from a phone in hand to a screen across the room.

Or your own two pictures

Upload a closed and an open picture: the parcel as wrapped, then what was inside. Included with the Event Pass and Pro.

7 looks and 13 drawn objects are free. The premium looks, the other objects, your own pictures, the animations, typefaces and text sizes come with the Event Pass or Pro.

Build yours โ†’
49
looks
31
objects that open
10
typefaces
8
unlock animations
12
lock types
5
player languages

A complete example: a pre-calculus escape in eight locks

Built by a teacher, on this product, for a revision lesson. The shape is worth copying whatever you teach.

The subject
Eight pre-calculus problems, one per lock, in rising difficulty.
The mechanic
Each correct answer reveals one digit and the next problem.
The final lock
The eight digits, in order, open the last box.
Group size
Tables of four, one phone each so nobody watches somebody else do it.
The hint
One hint per lock, written to unstick rather than to give away. It appears after the first wrong answer.
The reward
A class certificate, and the choice of the next lesson's activity.
What the teacher sees
Which lock each group is on, live, so help goes where it is needed.

Six classroom shapes

The digit trail

Each answer gives one digit. The digits open the final box. Works for any subject.

The vocabulary run

Five words in the language being taught, one lock each, a short film at the end.

The chemistry safe

Element symbols as the code. The reveal is the next experiment's instructions.

The school rally

QR codes taped around the building. Each one is a lock, each answer sends them to the next.

The rules quiz

The school rules, as a game, in the first week. They remember it.

The stations

Six stations, six locks, groups rotating on a timer.

Simple, honest pricing

Free for classroom use, with three locks and unlimited pupils. Pro adds the clock, the live board that shows where each group is, and duplicating a game for your other classes.

Free

$0forever

Build a real lock, single or multi-step, and let people play it. No time limit.

See what is included
  • 3 locks
  • 1 multi-step lock of up to 3 steps
  • Text, link, image, button and promo code reveals
  • Basic statistics
  • Lock Challenge branding on the player page
  • Personal and educational use
Create a free lock

Event Pass

$9.90once

One event, dressed properly. Every look, animation and typeface, and your experience live for 30 days. It closes when the pass ends and reopens the moment you pay again. Running sessions, the results and the timer stay with Pro.

See what is included
  • Everything in Free, for one event
  • No Lock Challenge branding
  • Your own accent colour on multi-step locks
  • 42 premium looks and 18 more drawn objects
  • Your own before/after pictures
  • 8 unlock animations to choose from
  • 22 dressed scenarios, ready to run
  • Audio, video and file reveals
  • Sudoku locks, generated in three difficulties
  • Wordle locks, with coloured guesses
  • Text size and font
  • Email invitations, up to 200 at once, tracked person by person
  • 10 locks and an 8-step trail
  • One payment. Your event runs for 30 days.
Get the Event Pass
Best value

Pro

$14.90per month

See what is included
  • Everything in the Event Pass, all year
  • Unlimited locks, multi-step locks and steps
  • Printable QR pack
  • Live dashboard and leaderboard
  • Scheduling
  • Detailed results and CSV export
  • Player emails, collected at the reveal and exported
  • Timed challenges: a clock the server keeps, per game and per step, one play per device
  • A cap on how many people win, with a sold-out message
  • Access code, player and attempt caps, single use
  • An event date, with a reminder the day before and a report the morning after
  • Choose whether players can look back at the steps they solved
  • Your logo on the lock
  • Duplicate a whole multi-step lock in one click
  • Bulk step creation
  • Iframe embedding
  • A "challenge a friend" button under your reveal
  • Commercial use
  • Cancel any time
Get Pro โ†’

Every plan: 12 free lock formats, unlimited players and attempts, 7 looks and 13 before/after picture pairs, QR code and short link.

Classroom questions

What is a digital escape game for the classroom?

A short trail of locks, each one a question from the lesson. Answering opens the next, and the last one opens a box with a reward in it. Pupils play on the phones or tablets they already have, in the room, in about twenty minutes.

Do pupils need accounts?

No, and this matters for a school: pupils never sign up, never give an address, and nothing is stored about them beyond the anonymous progress of the browser they are playing on. Only the teacher has an account.

How long does it take to build one?

A five-lock trail is about twenty minutes the first time and ten after that. Start from the classroom template and change the questions.

Can I use it for several classes?

Yes. On Pro you can duplicate a game, so each class gets its own link and its own results without rebuilding it.

Can I see how they are doing while they play?

On Pro, yes: a live board shows which lock each group has reached, so you can go to the table that is stuck rather than the one that is loudest.

Does it work without pupil phones?

Yes. Run it on the board as a whole-class activity, or on the school tablets. One link works on anything with a browser.

Revision they argue about

Start from the classroom template, change the questions to yours, and print the QR code. Free, and no pupil signs up for anything.

Build your classroom escape โ†’